[R] add lines() to 1st plot in layout() after calling 2nd plot()?

[Greg Snow]

This only works if all the plots are the same size and the defaults are used for the margins.  Try it with different sized figure regions in layout, the added lines don't match at the end.

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of baptiste auguie
> Sent: Sunday, October 04, 2009 3:33 AM
> To: r-help
> Subject: Re: [R] add lines() to 1st plot in layout() after calling 2nd
> plot()?
> 
> Hi,
> 
> Try this,
> 
> dev.new()
> layout(matrix(1:4,2, by=T))
> 
> plot(1:10,main="top left plot")
> plot(1:10,main="top right plot")
> plot(1:10,main="bottom left plot")
> plot(1:10,main="bottom right plot")
> 
> for (ii in 1:2){
> for (jj in 1:2){
> par(mfg=c(ii,jj))
> text(5,2, lab=paste("plot #:",ii,",",jj,sep=""))
> }
> }
> par(mfg=c(1,1))
> lines(c(3:7,7:3),col="red")
> 
> HTH,
> 
> baptiste
> 2009/10/4 Marianne Promberger <marianne.promberger at kcl.ac.uk>:
> > Thanks for the quick reply. However ...
> >
> > David Winsemius <dwinsemius at comcast.net> 03-Oct-09 20:50:
> > MP> layout(matrix(c(1,2),1))
> > MP> plot(1:10,main="left plot")
> > MP> plot(10:1,main="right plot")
> > MP> lines(c(3:7,7:3),col="red")
> > MP>
> > MP> but of course now lines() gets added to the "right plot". I
> > MP>
> > MP> Is there any way to make the lines() go to the fist plot ("left
> > MP> plot")?
> >>
> >> If you look at layout's help page there appears to be a worked
> example
> >> of an even more complex task. The answer appears to be assingning
> >> numbers to regions and then inserting par(mar=  with an
> appropriately
> >> constructed destination arguments prior to each added piece.
> >
> > Sorry, but I fail to find the solution in the page returned by
> > ?layout, assuming that's what you mean.
> >
> > Yes, the numbers in the matrix given to layout() give the order of
> > where plots will be put, so
> >
> > layout(matrix(c(2,1),1))
> >
> > then
> >
> > plot(1:10,main="left plot")
> > plot(10:1,main="right plot")
> > lines(c(3:7,7:3),col="red")
> >
> > puts "left plot" on the right hand side and "right plot" on the
> > left. But the lines() still go to the "right plot" plot (now on the
> > left hand side) which gets called last.
> >
> > The par(mar ... of the "scatterplot with marginal histograms" example
> > just set the margins of the histogram plots, then they get plotted to
> > the region with the next number given in the layout() matrix.
> >
> > Maybe I'm missing something.
> >
> > Thanks,
> >
> > Marianne
> >
> >>
> >> --
> >> David
> >>
> >> On Oct 3, 2009, at 3:15 PM, Marianne Promberger wrote:
> >>
> >>> Dear R users,
> >>>
> >>> I create a graphic with two plots side by side using layout(), like
> >>> this:
> >>>
> >>> layout(matrix(c(1,2),1))
> >>> plot(1:10,main="left plot")
> >>> lines(c(3:7,7:3),col="red")
> >>> plot(10:1,main="right plot")
> >>>
> >>> The lines() obivously get added to the "left plot" plot.
> >>>
> >>> Now, I'm trying to write a function that builds up a plot bit by
> bit
> >>> to
> >>> then include it in a LaTeX presentation with overlays. I'm using
> >>> dev.copy(), and it would make my life much easier (because in fact
> I
> >>> call all sorts of additional axis() etc after plot) if I could call
> >>> the above commands in this order:
> >>>
> >>> layout(matrix(c(1,2),1))
> >>> plot(1:10,main="left plot")
> >>> plot(10:1,main="right plot")
> >>> lines(c(3:7,7:3),col="red")
> >>>
> >>> but of course now lines() gets added to the "right plot". I
> >>>
> >>> Is there any way to make the lines() go to the fist plot ("left
> >>> plot")?
> >>>
> >>> Marianne
> >>>
> >>
> >> David Winsemius, MD
> >> Heritage Laboratories
> >> West Hartford, CT
> >>
> >> ______________________________________________
> >> R-help at r-project.org mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >
> > --
> > Marianne Promberger PhD, King's College London
> > http://promberger.info
> > R version 2.9.2 (2009-08-24)
> > Ubuntu 9.04
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.